drivers/input/joystick/warrior.c

   1 /*
   2  * $Id: warrior.c,v 1.14 2002/01/22 20:32:10 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Logitech WingMan Warrior joystick driver for Linux
   9  */
  10
  11 /*
  12  * This program is free warftware; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  *  Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/serio.h>
  36 #include <linux/init.h>
  37
  38 #define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 /*
  45  * Constants.
  46  */
  47
  48 #define WARRIOR_MAX_LENGTH      16
  49 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  50 static char *warrior_name = "Logitech WingMan Warrior";
  51
  52 /*
  53  * Per-Warrior data.
  54  */
  55
  56 struct warrior {
  57         struct input_dev dev;
  58         int idx, len;
  59         unsigned char data[WARRIOR_MAX_LENGTH];
  60         char phys[32];
  61 };
  62
  63 /*
  64  * warrior_process_packet() decodes packets the driver receives from the
  65  * Warrior. It updates the data accordingly.
  66  */
  67
  68 static void warrior_process_packet(struct warrior *warrior, struct pt_regs *regs)
  69 {
  70         struct input_dev *dev = &warrior->dev;
  71         unsigned char *data = warrior->data;
  72
  73         if (!warrior->idx) return;
  74
  75         input_regs(dev, regs);
  76
  77         switch ((data[0] >> 4) & 7) {
  78                 case 1:                                 /* Button data */
  79                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  80                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  81                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  82                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  83                         break;
  84                 case 3:                                 /* XY-axis info->data */
  85                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  86                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  87                         break;
  88                 case 5:                                 /* Throttle, spinner, hat info->data */
  89                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  90                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  91                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  92                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  93                         break;
  94         }
  95         input_sync(dev);
  96 }
  97
  98 /*
  99  * warrior_interrupt() is called by the low level driver when characters
 100  * are ready for us. We then buffer them for further processing, or call the
 101  * packet processing routine.
 102  */
 103
 104 static irqreturn_t warrior_interrupt(struct serio *serio,
 105                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 106 {
 107         struct warrior* warrior = serio->private;
 108
 109         if (data & 0x80) {
 110                 if (warrior->idx) warrior_process_packet(warrior, regs);
 111                 warrior->idx = 0;
 112                 warrior->len = warrior_lengths[(data >> 4) & 7];
 113         }
 114
 115         if (warrior->idx < warrior->len)
 116                 warrior->data[warrior->idx++] = data;
 117
 118         if (warrior->idx == warrior->len) {
 119                 if (warrior->idx) warrior_process_packet(warrior, regs);
 120                 warrior->idx = 0;
 121                 warrior->len = 0;
 122         }
 123         return IRQ_HANDLED;
 124 }
 125
 126 /*
 127  * warrior_disconnect() is the opposite of warrior_connect()
 128  */
 129
 130 static void warrior_disconnect(struct serio *serio)
 131 {
 132         struct warrior* warrior = serio->private;
 133         input_unregister_device(&warrior->dev);
 134         serio_close(serio);
 135         kfree(warrior);
 136 }
 137
 138 /*
 139  * warrior_connect() is the routine that is called when someone adds a
 140  * new serio device. It looks for the Warrior, and if found, registers
 141  * it as an input device.
 142  */
 143
 144 static void warrior_connect(struct serio *serio, struct serio_driver *drv)
 145 {
 146         struct warrior *warrior;
 147         int i;
 148
 149         if (serio->type != (SERIO_RS232 | SERIO_WARRIOR))
 150                 return;
 151
 152         if (!(warrior = kmalloc(sizeof(struct warrior), GFP_KERNEL)))
 153                 return;
 154
 155         memset(warrior, 0, sizeof(struct warrior));
 156
 157         warrior->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
 158         warrior->dev.keybit[LONG(BTN_TRIGGER)] = BIT(BTN_TRIGGER) | BIT(BTN_THUMB) | BIT(BTN_TOP) | BIT(BTN_TOP2);
 159         warrior->dev.relbit[0] = BIT(REL_DIAL);
 160         warrior->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_THROTTLE) | BIT(ABS_HAT0X) | BIT(ABS_HAT0Y);
 161
 162         sprintf(warrior->phys, "%s/input0", serio->phys);
 163
 164         init_input_dev(&warrior->dev);
 165         warrior->dev.name = warrior_name;
 166         warrior->dev.phys = warrior->phys;
 167         warrior->dev.id.bustype = BUS_RS232;
 168         warrior->dev.id.vendor = SERIO_WARRIOR;
 169         warrior->dev.id.product = 0x0001;
 170         warrior->dev.id.version = 0x0100;
 171
 172         for (i = 0; i < 2; i++) {
 173                 warrior->dev.absmax[ABS_X+i] = -64;
 174                 warrior->dev.absmin[ABS_X+i] =  64;
 175                 warrior->dev.absflat[ABS_X+i] = 8;
 176         }
 177
 178         warrior->dev.absmax[ABS_THROTTLE] = -112;
 179         warrior->dev.absmin[ABS_THROTTLE] =  112;
 180
 181         for (i = 0; i < 2; i++) {
 182                 warrior->dev.absmax[ABS_HAT0X+i] = -1;
 183                 warrior->dev.absmin[ABS_HAT0X+i] =  1;
 184         }
 185
 186         warrior->dev.private = warrior;
 187
 188         serio->private = warrior;
 189
 190         if (serio_open(serio, drv)) {
 191                 kfree(warrior);
 192                 return;
 193         }
 194
 195         input_register_device(&warrior->dev);
 196
 197         printk(KERN_INFO "input: Logitech WingMan Warrior on %s\n", serio->phys);
 198 }
 199
 200 /*
 201  * The serio device structure.
 202  */
 203
 204 static struct serio_driver warrior_drv = {
 205         .driver         = {
 206                 .name   = "warrior",
 207         },
 208         .description    = DRIVER_DESC,
 209         .interrupt      = warrior_interrupt,
 210         .connect        = warrior_connect,
 211         .disconnect     = warrior_disconnect,
 212 };
 213
 214 /*
 215  * The functions for inserting/removing us as a module.
 216  */
 217
 218 int __init warrior_init(void)
 219 {
 220         serio_register_driver(&warrior_drv);
 221         return 0;
 222 }
 223
 224 void __exit warrior_exit(void)
 225 {
 226         serio_unregister_driver(&warrior_drv);
 227 }
 228
 229 module_init(warrior_init);
 230 module_exit(warrior_exit);